tril·lion | \ ˈtri(l)-yən \

Definition of trillion 

1 : a number equal to 1,000 times one billion — see Table of Numbers

2 : an indeterminately large number a trillion mosquitoes out tonight

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Other words from trillion

trillion adjective
trillionth \ˈtri(l)-yən(t)th \ adjective or noun

Examples of trillion in a Sentence

Recent Examples on the Web

Who has been electing politicians who, year after year, keep piling up the national debt, now in the untold trillions of dollars? Republicans and Democrats have done it and millennials — conservative or liberal — have had nothing to do with it. John Kass,, "30-year-old slacker evicted from parents' basement could prove doubters wrong, lead the millennials," 26 May 2018 But protecting the human species from the end of life on Earth could save trillions of lives. Derek Thompson, The Atlantic, "Is Colonizing Mars the Most Important Project in Human History?," 29 June 2018 The economic stress of disasters is now regularly measured in billions—and even sometimes in trillions of dollars—and has measureable impacts to GDP. Jeff Schlegelmilch, Fortune, "The 2018 Hurricane Season Is Here. We Can’t Just Rely on the Federal Government to Help Us Prepare," 30 May 2018 That means Republicans haven't yet spent millions of dollars highlighting the costs of government-run health care, which could run into the trillions. NBC News, "Meet the progressive whose surprise win just spoiled establishment Democrats' plans," 16 May 2018 The foreign minister of Ukraine represents a country with a gross domestic product of $93 billion, compared to envoys from countries with economies measured in the trillions of dollars. Carol Morello, Washington Post, "The personal is political for Canada’s foreign minister," 23 Apr. 2018 With so many users affected, the fines could theoretically run into the trillions. Nitasha Tiku, WIRED, "Why Facebook's 2011 Promises Haven't Protected Users," 11 Apr. 2018 His company is under investigation around the world, including a probe in the United States that threatens Facebook with fines that could reach into the trillions of dollars. Tony Romm,, "Facebook's Mark Zuckerberg faces long-awaited 'reckoning' in Congress," 6 Apr. 2018 These companies have invested hundreds of billions if not trillions of dollars on the assumption the wheels of global commerce will continue to turn with increasing ease. Matthew Campbell,, "In waging trade war, Trump must figure out who the enemy even is," 2 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'trillion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of trillion

1690, in the meaning defined at sense 1

History and Etymology for trillion

French, from tri- + -illion (as in million)

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Statistics for trillion

Last Updated

1 Sep 2018

Look-up Popularity

Time Traveler for trillion

The first known use of trillion was in 1690

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More Definitions for trillion



English Language Learners Definition of trillion

: the number 1,000,000,000,000 : one thousand billion

: a very large amount or number

: the number 1,000,000,000,000,000,000 : one million million million


tril·lion | \ ˈtril-yən \

Kids Definition of trillion

: a thousand billions

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